Hypodermic syringe



April 1, 1930. w. F. JAMISON 1,752,384

HYPODERMIC SYRINGE Filed July 2, 1928 Patented Apr. 1, 1930 UNITED STATEfi WILLIAM F. JAMISON, OF LOS ANGELES, CALIFORNIA HYPODERMIC SYRINGE Application filed July 2, 1928.

This invention relates to hypodermic syringes, and has for its general object to provide a device of this character into which I a medicinal package in the nature of an ampule may be charged, after the manner of loading a gun, the several parts being so correlated and arranged that a freshly made medicinal preparation may be injected by the syringe without at any time coming in contact with human hands, unsterilized parts,

or the like.

A further object of the invention is to provide a syringe of the above character which is extremely simple in construction, and which embodies simple and eflicient means to form the necessary fluid tight joint between the ampules and the syringe, expeditiously and with very little trouble upon the part of the user.

A further object of the invention is to provide an ampule having a special construction adapting it to be placed in a hypodermic syringe, so that the ampule operates as the cylinder or barrel of the syringe.

combination and arrangement of parts hereinat'ter more fully described, shown in the.

accompanying drawing and claimed.

In the drawing:

Figure 1 is a side elevational view of a syringe embodying the present invention having an ampule operatively positioned there- 1n.

Figure 2 is a view of the syringe shown in Figure 1, substantially in central longitudinal section.

Figure 8 is a fragmentary developed perspective view, showing'the hypodemic needle, the packing disk and the adjacent end of the ampule;

Figure 4 is a perspective View of the ampule; and

Figure 5 is a side elevational view of the detachable head for the syringe barrel.

The syringe of the present-invention is particularly designed to discharge the contents of the ampule shown in Figures 2 to 4 inclusive. This ampule comprises a glass body Shaving a convexo-spherical front end 6 which is provided with a central or axial The invention consists in the novel form,'

Serial No. 289,904.

outlet aperture 7 normally closed by a removable scaling element 8 in the nature of a thin layer of sealing wax or the like. The ampule contains a rubber or other stopper 9 which is adapted to act as a piston to expel the contents of the ampule through the opening 7 after the sealing element 8 has been removed. Any suitable sealing medium may be placed over the open rear end of the ampule 5 and the exposed end of the stopper 9 so as to maintain the contents of-the ampule in an absolutely sterile condition until the time of use.

The syringe comprises a barrel 10 in the rear end of which is removably threaded a closure plug 11 which carries a detachable cross bar 12 for engagement by the fingers of the operator, the palm of whose hand engages a handle or crossbar 13 upon the outer end of a plunger rod 14, the cross bar 12 being clamped between an annular shoulder 15 l of the plug 11 and the adjacent end of the barrel 10 as clearly shown in Figure 2. The

' plunger rod 14 carries a plunger 16 at its inner end which is adapted to engage the stopper 9 and force said stopper forwardly to expel the liquid contents of the ampule from the latter. An internal shoulder or annular flange 17 is provided in the barrel 1() adjacent its rear end to form a seat at one side for the plug 11 and at the other side for the adjacent rear end of the ampule 5, and as this flange is rigid, there is no danger of breaking or crushing the ampule by threading the plug 11 inwardly an excessive distance.

The forward end of the barrel 10 is enlarged or counterbored to receive the sleeve ortion 18 of a head 19, which sleeve portion of the head 19 has a bayonet joint connection with the enlarged or counterbored forward end of the barrel 10 as at 20. The head 19 has an axial bore and terminates in an axial tip 21 in which is removably fitted an elongated sleeve 22 having an annular flange 23 on its outer end adapted to abut an internal shoulder provided in a cap 2% adjustably threaded on the tip 21. The flange 23 will be spaced from the free end of the tip 21 and extends through'the head 19 into the sleeve portion 18 thereof adjacent the forward end of the ampule 5 as clearly shown in Figure 2.

. inner end, the tightening of the cap 24 will necessary a cause the washer 27 to be pressed tightly against the'convexo-spherical forward end 6 o the ampule 5 about the opening 7 to form "a fluid tight joint between the hypodermic needle 25 and the ampule 5. Naturally, the seat member 26 conforms to the shape of the forward end of the ampule so that the packing washer 27 will be uniformly shaped and compressed against the adjacent end of the am ule for most effectively insuring against lea age of the contents of t e ampule through the opening or a rture 7 about the hypodermic needle 25. hen the cap 24 is threaded onto the tip 21, the ampule 5 has its rear end firml pressed a ainst the flange 17, after whic seating o the washer 27 properly against the end 6 of the ampule takes place. In this way the ampule may be expeditiously and efiect vely positioned and held for discharge of its contents when the plunger 16 is actuated.

In use, the head 19 together with the sleeve 24 and hypodermic needle 25 is detache from the arrel 10, and the lunger rod 14 is full withdrawn to the position of Figure 2. T e ampule is then inserted into the barrel 10' through the open forward end of the latter until it seats a ainst the flange 17, it being understood that t e sealing means are however, previousl removed. The head 19 is then applied to t e barrel 10 and any justment of the ca 24 is then made to efiect proper seating o the ampule against the flange 17 and seating of the Washer 27 against the forward end of the ampule with the rear or inner end of the hypodermic needle 27 projecting into the ad acent end of the ampule through the opening 7. When pressure isap lied to the handle 13 to force the plunger ownwardly or inwardly, said plunger contacts with the stopper 9 and exerts pressure upon the liquid within the ampule. This pressure upon theli uid in turn forces the liquid out through the ypodermic needle.

It is to be understood that the invention is not limited to the precise construction set forth, but that minor changes may be made without departing from the spirit and scope of the invention as claimed.

What I claim as new is:

1. A syringe of the. character described comprising a barrel adapted to receive an ampule, a ead removably applied to the forward end of the barrel and having a sleeve slidably extending therethrough, a hypodermic needle extending through said sleeve and the head and provided-near its inner end with a rigid seat engaging the inner end of said sleeve, a washer on the inner end of the needle at the inner side of said seat adapted to make fluid tight contact with the end of the ampule when the needle is adjusted inwardly and means to inwardly adjust said sleeve for correspondingly adjusting the needle.

2. A syringe of the character described comprisin a barrel adapted to receive an ampule, a ead removably applied to the for ward end of the barrel and aving a sleeve slidably extending therethrough, a hypodermic needle extendin through said sleeve and the head and provi ed near its inner end with a rigid seat engaging the inner end of said sleeve, a washer on the innerend of the needle at the inner side of said seat adapted to make fluid tight contact with the end of the ampule when the needle is adjusted inwardly, means to inwardly adjust said sleeve .for correspondingly adjusting the needle,

said last named means comprising a cap adjustably threaded on the detachable head and abutting the outer end of the sleeve.

3. A syringe of the character described comprising a barrel adapted to receive an ampule, a head removably a plied to the forward end of the barrel an aving a sleeve slidably extending therethrou a hypodermic needle extendin througi said'sleeve and the head and prov," ed near its inner end with a rigid seat engaging the inner end of said sleeve a washer-on the inner end of the needle at the inner side of said seat ada ted to make fluid tight contact with the end 0? the ampule when the needle is adjusted inwardly, means to inwardly adjust said sleeve for cor-. respondingly adjusting the needle and an internal shoulder in the rear end of the barrel forming a rigid abutment'for the rear end of the ampule. f

4. A syrin e of the character described comprising a arrel having a removable head at its forward end and adapted to receive an ampule, a hypodermic needle slidable the inner. end portionof the needle, a packin washer on the needle at the inner side of sai seat member adapted to form a fluid tight connection between the needle and the ampule upon inward adjustment of said needle, means associated with the head for inwardly adjusting "said needle an abutment for the rear end of the ampule on the inside of the barrel ad'acent the rear end of the latter, said needle a just-ing means embodying a sleeve slidable through the head and abuttin the outer side of said seat member, and an a usting cap for the sleeve threaded on said head. 139

through said head and adapted to enter the j forward end of the ampule, a seat member on.

5. A syrin e of the character described comprising a arrel having a removable head at its forward end and adapted to receive an ampule, a hypodermic needle through said head and adapted to enter the forward end of the ampule a seat member on the inner end portion of the needle, a packing washer on the needle at the inner side of said seat member adapted to form a fluid tight connection between the needle and the ampule upon inward adjustment of said needle, means associated with the head for inwardly adjusting said needle, an abutment for the rear end of the ampule on the inside of the barrel adjacent the rear end of the latter, said needle adjusting means embodying a sleeve slidable through the head and abutting the outer side of said seat member,

an adjusting cap for the sleeve threaded on said head, said ampule hav'in a convexospherical forward end provide with a central aperture to receive the inner end of the needle, said seat member being of concavospherical form to fit and tightly seat the washer against the adjacent end of said ampule. 1

In testimony whereof I aflix my signature.

WILLIAM F. JAMISON.

slidable 

